I just came across this linked to in the Obtainium README. It is sort of a Ninite-like webpage that allows you to quickly and easily add apps from a curated list into Obtainium on your device. Really useful when setting up a new device or something.

I do wish it was more like Ninite, in that you currently have to tap the "Add to Obtainium" button under each and every individual app that you want go add . I wish this site also allowed you to instead check a checkbox on each app that you want, and then press one button that would add all the checked apps to Obtainium for you.